To count as teaching:

– it has to be active. If an individual is living it”s life and another is just learning something from him or her do not count as teaching.

– it has to come with a cost to the teacher by alocating extra time or extra resources for the specific task of transfering knoledge.

– the teacher has to set an example to be copied or followed.

– if it leads to faster learning, quicker then learning by just testing.

If this is a set criteria to be a teacher in Home Schooling or in Unschooling you are not a teacher, you are just a guide.